import buildURL from '../helpers/buildURL';
import buildFullPath from '../core/buildFullPath';
import settle from '../core/settle';
import { isUndefined } from '../utils';

/**
 * 返回可选值存在的配置
 * @param {Array} keys - 可选值数组
 * @param {Object} config2 - 配置
 * @return {{}} - 存在的配置项
 */
const mergeKeys = (keys, config2) => {
  const config = {};
  keys.forEach((prop) => {
    if (!isUndefined(config2[prop])) {
      config[prop] = config2[prop];
    }
  });
  return config;
};
export default ((config) => new Promise((resolve, reject) => {
  const fullPath = buildURL(buildFullPath(config.baseURL, config.url), config.params);
  const _config = {
    url: fullPath,
    header: config.header,
    complete: (response) => {
      config.fullPath = fullPath;
      response.config = config;
      try {
        // 对可能字符串不是json 的情况容错
        if (typeof response.data === 'string') {
          response.data = JSON.parse(response.data);
        }
        // eslint-disable-next-line no-empty
      } catch (e) {
      }
      settle(resolve, reject, response);
    }
  };
  let requestTask;
  if (config.method === 'UPLOAD') {
    delete _config.header['content-type'];
    delete _config.header['Content-Type'];
    const otherConfig = {
      // #ifdef MP-ALIPAY
      fileType: config.fileType,
      // #endif
      filePath: config.filePath,
      name: config.name
    };
    const optionalKeys = [
    // #ifdef APP-PLUS || H5
    'files',
    // #endif
    // #ifdef H5
    'file',
    // #endif
    // #ifdef H5 || APP-PLUS
    'timeout',
    // #endif
    'formData'];

    requestTask = uni.uploadFile({ ..._config, ...otherConfig, ...mergeKeys(optionalKeys, config) });
  } else if (config.method === 'DOWNLOAD') {
    // #ifdef H5 || APP-PLUS
    if (!isUndefined(config.timeout)) {
      _config.timeout = config.timeout;
    }
    // #endif
    requestTask = uni.downloadFile(_config);
  } else {
    const optionalKeys = [
    'data',
    'method',
    // #ifdef H5 || APP-PLUS || MP-ALIPAY || MP-WEIXIN
    'timeout',
    // #endif
    'dataType',
    // #ifndef MP-ALIPAY
    'responseType',
    // #endif
    // #ifdef APP-PLUS
    'sslVerify',
    // #endif
    // #ifdef H5
    'withCredentials',
    // #endif
    // #ifdef APP-PLUS
    'firstIpv4'
    // #endif
    ];
    requestTask = uni.request({ ..._config, ...mergeKeys(optionalKeys, config) });
  }
  if (config.getTask) {
    config.getTask(requestTask, config);
  }
}));